Saw-frame.



PATENTED DEG. 25, 1906.

A. ALLEN.

SAW FRAME.

APPLICATION FILED JULY'1.19oo.

.MM m,

W/ TNE SSE S www@ A TTORNEYS AUGUST ALLEN, OF LEAD, SOUTH DAKOTA.

SAW-FRAME.

Specification or' Letters Patent.

Patented Dee. 2.5, 1906.

Application tiled July 7, 1906. Serial No. 325.148.

To all, whom, it may concern:

Be it known that I, AUGUST ALLEN, a citi- Zen of the United States, and a resident of Lead, in the county of Lawrence and State of South Dakota, have invented a new and Improved Saw-Frame, of which the following is a full, clear, and exact description.

This invention is an improvement in saw-` frames, relating especially to that class of saw-frames for receiving a detachable blade.

The object of the invention is not only to generally improve the construction of sawframes of this character, making them more convenient to handle, cheapening and simplifying them, but also to provide a novel and easily-operated means for stretching the saw-blade in the frame after it is applied thereto.

Reference is to be had to the accompanying drawings, forming a part of this specification, in which similar characters of reference indicate corresponding` parts in all the figures.

Figure 1 is a side elevation of the saw complete with the handle thereof thrown to operative position to stretch the blade in the frame. Fig. 2 is a fragmentary vieviT of an end of the saw-frame carrying the bladetightening means with a handle or lever thereon thrown to inoperative position for releasing the blade or to admit of one being applied thereto. Fig. 3 is a detail View illustrating the construction of one member of the saw-frame. Fig. 4 is a transverse sectional view on the line 4 i of Fig. 1, and Fig. 5 is a transverse horizontal section on the line 5 5 of Fig. l.

The frame of the saw is preferably constructed of a single piece of pipe comprising front and rear bars l and 2, connected bya horizontal bar 3, providing a frame of the U type. The ends of the bars l and 2 are lattened and the frame slotted to receive one end of a saw-blade 4, held between the flattened portions at the end of the bar 1 by a pin 5 or other equivalent means. The flattened portion of the saw-frame at the end of the bar 2 is out out on one side, as shown in Fi 5, to form a pocket for containing a tig tening-lever 6, said lever being iiattened and provided with a handle 7, extending therefrom, of cylindrical or other convenient shape and operable not only to tighten the blade, but also serving as a handle for working the saw.` The attened portion forming said pocket has passing through each side of it two alininfr and rearwardly-inclined slots 8, through wiich a rivet 9 passes when the saw is assembled, embracing at each side links 10, the latter provided at their opposite ends with inset portions 1l, which are apertured in order to receive and connect them with the opposite end of the blade 4, as by a pin 12. The rivet 9 passes through the lever 6 near its outer edge at such a distance from the end of the lever that when the latter is turned about the rivet as a center a cam-toe 13 will ride on the inner face of the pocket and force the rivet 9 to the opposite ends of the slots 8 and hold the lever in the downwardly-extending position shown in Fig. 1.

The pocket containing the lever 6 is eX- tended at its front side at -14 in order to insure a better bearing-surface when the lever is in closed position. By means of this tightening mechanism it is only necessary to throw the handle upward at an angle to the frame, as shown in Fig. 2, to remove or place a blade in the frame.

Although I have described the invention in detail, it is evident that various immaterial changes may be made without departing from the spirit of my invention, and I consider that I am entitled to such modifications as fall within the scope of the annexed claims.

Having thus described my invention, I claim as new and desire to secure by Letters Patent- 1. A saw-frame having one end slotted for receiving one end of a blade, a pocketformed at the opposite end of the frame having slots,

a handle for the frame pivoted at one end in the slots of the pocket, a cam at the eXtremity of the pivoted end of the handle, and means for connecting the handle with the opposite end of the blade, whereby when it is turned downwardly the saw is tightened in the frame.

2. A saw-frame comprising a pipe bent into U shape with flattened ends, one of said ends being slotted to receive one end of a blade and the opposite end cut out at one side to form a pocket having a rearwardlyinclined slot at each side thereof, a lever havinga cam end arranged in the pocket, links for receiving the opposite end of the blade, and a rivet passing through the lever, slots and links pivotally connecting the latter at opposite sides of the pocket.

3. A saw-frame made from a single piece of pipe with flattened ends, one of said` ends being slotted for receiving a blade, the opposite IOO end being out out at one side providing a l and a lever in the pocket pivotally mounted pocket, a handle pivotally mounted in the on the pivot of the links and having a cam pocket, and means operable by the handle end for tightening the blade in the frame. for tightening the blade in the frame. 1 In testimony whereof I have signed my 5 4.' A saw-frame having arranged at its rename to this specification in the presence of 15 speotiveends means for attaching one end of tWo subscribing Witnesses.

a blade and a slotted pocket, means for at- AUGUST ALLEN. taohing the opposite end of the blade, eom- Witnesses: prising links pvotally connected at opposite JOHN LANDBIG,

1o sides of the pocket through the slots therein7 f HERMAN HUMBLE. 

